Page 211 - Hybrid-Renewable Energy Systems in Microgrids

Sensitivity and transient stability analysis of fixed speed wind generator 191

4 Appendix

System operating point
Parameter Value

V W 12.4 m/s
V dgrid 1 pu
V qgrid 0 pu
I rd0 0.850 pu
I rq0 0.30 pu
Ψ sd0 0.0045 pu
Ψ sq0 1 pu

System parameters
Parameters Values
Rated MVA 4 MVA
Rated voltage (V) 690 V
Base frequency 377 rad/s
Stator resistance, R s 0.00706 pu
Rotor resistance, R r 0.005 pu
Stator self-inductance, L s 3.07 pu
Rotor self-inductance, L r 3.056 pu
Magnetizing reactance, L m 2.9 pu
Generator inertia constant, H r 0.75 sec
Turbine inertia constant, H t 4.3 s
Braking resistor, RB 0.18 pu
Line resistance, RT 0.01 pu
Line inductance, L t 0.1 pu

Calculation of Jacobian matrix element
The following are the Jacobian matrix elements, which have been used for specific
sensitivity analysis:

a 3,2 = K /2 H r a3,2=Ks/2Hr
s

a 1,2 =−K /2 H t a1,2=−Ks/2Ht
s

a 3,1 = D /2 H r a3,1=D/2Hr